It doesnt have structures that can be preserved in a fossil.
Explanation:
I'm assuming you're on Pennfoster cause me too.
4 options I'm not sure so correct me if I'm wrong
1. No fossil records exist for sharks.
( we have ancient shark teeth )
2. Salt water would degrade the fossil over time
(Idk maybe)
3. The species has survived too long
4. It doesnt have structure that can be preserved in fossil
( sharks are mostly collagen which doesnt preserve well, except teeth)
I'm about to submit my test I'll edit if I'm wrong.
Edit . I'm wrong
The simplified answer would be 31
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yes
Answer:
The Volume of globe would be 381.5 cubic inches if the dimensions of the globe was reduced by half.
Explanation:
× 
Radius is half of diameter
18÷2=9
radius=9in
Since the dimensions of the globe was reduced by half
radius=9÷2=4.5
× 
v= 4 × 3.14 × 30.375
v=12.56 x 30.375
v=381.51
v=381.5 in cubed
1. Crust - The solid crust is the external and weakest layer of our planet.
2. Mantle - It is comprised of silicate minerals that are similar to ones located in the crust, which is made up of more magnesium and iron and lighter silicon and aluminum.
3. Outer core - The outer core is formed mostly of iron and nickel, and these metals are obtained in liquid form.
4. Inner core - This hard layer is smaller than our Moon at 750 miles (1,200 km) deep and is formed chiefly of iron.
